Rational Design of Thermodynamic and Kinetic Binding Profiles by Optimizing Surface Water Networks Coating Protein-Bound Ligands
摘要:
A previously studied congeneric series of thermolysin inhibitors addressing the solvent-accessible S-2' pocket with different hydrophobic substituents showed modulations of the surface water layers coating the protein-bound inhibitors. Increasing stabilization of water molecules resulted in an enthalpically more favorable binding signature, overall enhancing affinity. Based on this observation, we optimized the series by designing tailored P-2' substituents to improve and further stabilize the surface water network. MD simulations were applied to predict the putative water pattern around the bound ligands. Subsequently, the inhibitors were synthesized and characterized by high-resolution crystallography, microcalorimetry, and surface plasmon resonance. One of the designed inhibitors established the most pronounced water network of all inhibitors tested so far, composed of several fused water polygons, and showed 50-fold affinity enhancement with respect to the original methylated parent ligand. Notably, the inhibitor forming the most perfect water network also showed significantly prolonged residence time compared to the other tested inhibitors.
Synthesis of Chiral Amines via a Bi‐Enzymatic Cascade Using an Ene‐Reductase and Amine Dehydrogenase
作者:Ewald P. J. Jongkind、Aurélie Fossey‐Jouenne、Ombeline Mayol、Anne Zaparucha、Carine Vergne‐Vaxelaire、Caroline E. Paul
DOI:10.1002/cctc.202101576
日期:2022.1.21
Dynamic duo: The combination of Old Yellow Enzymes and aminedehydrogenases gives access to chiralamines. By combining these enzymes with a cofactor recycling system into a cascade, inexpensive unsaturated aldehydes and ketones were converted into chiralamines with up to two stereocenters and high enantiopurity.
Psammocindoles A–C (1–3), a new class of indole alkaloids, were isolated from a Psammocinia vermis sponge. By combined spectroscopic analyses, the structures of these compounds were determined to be the indole-γ-lactams derived from three amino acid residues. In addition, an enantiomer psammocindole D (4), and the N-lactam isomers isopsammocindoles A–D (5–8) were also synthesized. These natural products
Simple Protocol for NMR Analysis of the Enantiomeric Purity of Primary Amines
作者:Yolanda Pérez-Fuertes、Andrew M. Kelly、Andrew L. Johnson、Susumu Arimori、Steven D. Bull、Tony D. James
DOI:10.1021/ol052776g
日期:2006.2.1
[reaction: see text] A practically simple three-component chiral derivatizing protocol for determining the enantiopurity of 13 chiral primary amines by (1)H NMR spectroscopic analysis is described, including analysis of those that contain remote stereocenters.
All possible stereoisomers of iminederivatives 1–4, which have the characteristic roastodor of seafood, were synthesized. As a result of odorevaluation of all isomers, we found that each isomer has a different and characteristic odor of roasted seafood.
SYNTHESIS OF THE FOUR POSSIBLE STEREOISOMERS OF<i>N</i>-2′-METHYLBUTYL-2-METHYLBUTYLAMIDE, THE SEX PHEROMONE OF THE LONGHORN BEETLE<i>MIGDOLUS FRYANUS</i>WESTWOOD
作者:Ellen M. Santangelo、Paulo H. G. Zarbin、Quezia B. Cass、José T. B. Ferreira、Arlene G. Corrêa
DOI:10.1081/scc-100107019
日期:2001.1
four stereoisomers of N-2′-methylbutyl-2-methylbutylamide, the sexpheromone of the longhorn beetle Migdolus fryanus, an economically important pest of sugarcane in South America, were synthesized. The key intermediate 2-methylbutan-1-ol is commercially available only in its (S)-(−)-form. The (R)-(+)-enantiomer was obtained opticallypure from methyl (S)-(+)-3-hydroxy-2-methylpropionate in five steps